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From: Diesel Damo on 6 Jul 2010 18:43
On Jul 7, 1:14 am, Kev <kev...(a)optunet.com.au> wrote:

> Next time remove the negative cable first
> removing the positive has the risk of it contacting the the body or
> other earth part, if you remove the negative it doesn't matter if it
> touches anything
>
> When disconnecting any battery always remove the negative first

Okay cool, will do from now on.
From: Neil Fisher on 6 Jul 2010 18:59
On Tue, 6 Jul 2010 05:44:49 -0700 (PDT), Diesel Damo
<Diesel_4WD(a)yahoo.com.au>, after considering some belly-button fluf,
wrote:
>Boyfriend was telling them
>not to start either car and also said not to connect the negative
>cable to the negative terminal - it should go to earth.
>

Connecting the negative side to chassis rather than battery post is so
that there is a reduced risk of igniting any hydrogen the battery may
be pumping out in a high charge/discharge state - a reasonable
precaution, providing you connect and disconnect the negative side
last, of course.

Neil
---
Neil Fisher / Bob Young
Thundercords
personal opinion unless otherwise noted.
Looking for spark plug leads?
Check out http://www.magnecor.com.au
From: Diesel Damo on 6 Jul 2010 19:06
On Jul 7, 8:59 am, Neil Fisher <n...(a)magnecor.com.au.invalid> wrote:

> Connecting the negative side to chassis rather than battery post is so
> that there is a reduced risk of igniting any hydrogen the battery may
> be pumping out in a high charge/discharge state - a reasonable
> precaution, providing you connect and disconnect the negative side
> last, of course.

Okay so that's you and John both saying neg should be removed last,
but Kev and Trev say it should be removed first. AFAIK you all have a
history of generally knowing what you're talking about, so um...
From: jonz on 6 Jul 2010 21:13
On 7/7/2010 9:06 AM, Diesel Damo wrote:
> On Jul 7, 8:59 am, Neil Fisher<n...(a)magnecor.com.au.invalid> wrote:
>
>> Connecting the negative side to chassis rather than battery post is so
>> that there is a reduced risk of igniting any hydrogen the battery may
>> be pumping out in a high charge/discharge state - a reasonable
>> precaution, providing you connect and disconnect the negative side
>> last, of course.
>
> Okay so that's you and John both saying neg should be removed last,
> but Kev and Trev say it should be removed first. AFAIK you all have a
> history of generally knowing what you're talking about, so um...
~~~~~~~~~~~~~~~~~~~
i`m with Kev and Trev.......further lessening the chance of a stray
spark and KAbooooomm..........


--
jonz
"Usenet is like a herd of performing elephants with diarrhea - massive,
difficult to redirect, awe-inspiring, entertaining, and a source of mind
- boggling amounts of excrement when you least expect it." - Gene
Spafford,1992
From: PhilD on 6 Jul 2010 21:21

"Diesel Damo" <Diesel_4WD(a)yahoo.com.au> wrote in message
news:bc95f6a7-9883-411a-a8fa-1aece85284e4(a)i16g2000prn.googlegroups.com...
On Jul 7, 8:59 am, Neil Fisher <n...(a)magnecor.com.au.invalid> wrote:

> Connecting the negative side to chassis rather than battery post is so
> that there is a reduced risk of igniting any hydrogen the battery may
> be pumping out in a high charge/discharge state - a reasonable
> precaution, providing you connect and disconnect the negative side
> last, of course.

+Okay so that's you and John both saying neg should be removed last,
+but Kev and Trev say it should be removed first. AFAIK you all have a
+history of generally knowing what you're talking about, so um...

All can be right, depending if some are talking about neg earth and some
about pos earth systems.

It's always been my understanding that on a neg earth system the positive
terminals are connected together then the neg terminal of the good vehicle
is clipped on to and then the other end of that cable is connected to the
chassis of the flat battery vehicle, away from the battery. This is in case
of hydrogen explosion as described above. Provided you are connecting cables
correctly it may also be a good idea to have the engine of the good vehicle
already running as there may be a possibility that the flat battery vehicle
may drag down the other battery and in a worst case scenario you could end
up with 2 vehicles going nowhere. Disconnection is reversed with chassis
point disconnected first.

In my case with the Range Rover, provided the battery still has enough
charge to run the ignition, I just drag out the crank handle and enjoy the
totally confused looks on peoples faces.

PhilD


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